Cutting the Corporate Tax from 35% to 20% is pretty major. Good luck ever coming back on that without being blackmailed on killing "growth" and "jobs".
So you admit cutting the tax rate will create jobs 
No
it may or it may not. Even if the latter, I know for a fact lobbyists will argue that any additional regulation on companies would turn turn the USA into a third world country overnight.
Thats basically what they have signaled their plan is if the FAKE NEWS media's anonymous sources are to be believed.
Pass this shit now, campaign in 2020 on how Democrats want to kill jobs, raise taxes, and ruin the economy; that the only path forward is cutting social spending and making the tax cuts permenant. Seasoned with some dog whistle politics to rally the base. Which has basically been the strategy since Reagan.
If the Republicans fuck up and lose a majority somewhere, or crash the economy as they often do, you start the whole Paul Ryan deficit pearl clutching thing. Claim the only way to health is maintaining or giving more tax cuts for the
rich middle-class.
But don't worry, Senate Democrats are on it this time with Reagan lionizing twitter memes at the ready. They're prepared to overcome the cycle this time.